蓝藻应对缺铁环境的生理响应与信号转导机制研究进展  

PROGRESS ON PHYSIOLOGICAL RESPONSE AND SIGNAL TRANSDUCTION MECHANISM OF CYANOBACTERIA IN IRON DEFICIENT ENVIRONMENT

作　　者：席怡操 刘玲妹 雍成文 陈未中 姜海波 XI Yi-Cao;LIU Ling-Mei;YONG Cheng-Wen;CHEN Wei-Zhong;JIANG Hai-Bo(School of Marine Sciences,Ningbo University,Ningbo 315211,China;School of Life Sciences,Central China Normal University,Wuhan 430079,China)

机构地区：[1]宁波大学海洋学院,宁波315211 [2]华中师范大学生命科学学院,武汉430079

出　　处：《水生生物学报》2025年第5期209-226,共18页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金(32170108、42188102和32470092);宁波市青年科技创新领军人才项目(2024QL060)资助。

摘　　要：蓝藻是地球上最古老的光合放氧生物,也是全球初级生产力的重要贡献者,其固碳量约占全球总固碳量的四分之一。铁是蓝藻生长繁殖的必需微量元素之一,是许多关键生理反应的重要辅因子。作为光合生物,蓝藻比其他非光合生物对铁的需求更高,以满足光合电子传输和叶绿素合成的需要。尽管铁在地球环境中含量丰富,但其生物利用率往往很低,是限制全球初级生产力的重要因素。为了解决自身的高铁需求与环境中铁缺乏之间的矛盾,蓝藻在长期进化过程中逐渐形成了独特的缺铁适应机制,以满足其在铁限制条件下的生长需求。文章综述了蓝藻应对缺铁胁迫的一系列生理响应及对铁元素的吸收机制,并着重对蓝藻感应环境铁浓度的信号转导机制进行了概述,介绍了多种转录调控因子维持胞内铁稳态的分子机制。Cyanobacteria are one of the oldest photosynthetic oxygen evolving organisms on Earth and play a crucial role in global primary productivity,accounting for about a quarter of the world’s total carbon sequestration.Iron,an essential trace element,is vital for the growth and reproduction of cyanobacteria and an important cofactor in many key physiological reactions.As photosynthetic organisms,cyanobacteria exhibit a higher demand for iron than other nonphotosynthetic organisms to support photosynthetic electron transport and chlorophyll synthesis.Although iron is abundant in the Earth’s environment,its bioavailability is low,which is an important factor limiting global primary productivity.In order to solve the contradiction between their own high-speed rail demand and the lack of iron in the environment,cyanobacteria have developed a unique iron deficiency adaptation mechanism during long-term evolution to meet their growth needs under iron limited conditions.This review summarized a series of physiological responses to iron deficiency stress and the absorption mechanisms of iron elements in cyanobacteria.It also provides an overview of the signal transduction mechanism by which cyanobacteria sense environmental iron concentration,and describes the molecular mechanisms of various transcription regulators in maintaining the intracellular iron homeostasis.

关 键 词：缺铁适应 生理响应 信号转导 铁吸收机制 蓝藻 

分 类 号：Q938.1[生物学—微生物学]